Frequencies for first 10,000 rows of ejection variable in person dataset :

   ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,258       72.58       72.58
          1 |      1,006       10.06       82.64
          2 |        198        1.98       84.62
          3 |         25        0.25       84.87
          8 |      1,383       13.83       98.70
          9 |        130        1.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016